Question

I'm getting that step 4 is incorrect.
Ciara solved the exponential equation 3x+1 = 15 and her work is shown below. What is the first step she did incorrectly?
http://prntscr.com/a6r57c

Answer 1

@jdoe0001 Am I correct?

Answer 2

Log_10 or Log_e ?

Answer 3

@zepdrix @phi I think it's step 4?

Answer 4

they get the correct answer, so they did not make an error
however, they did not do it very efficiently
step 3 looks like they took the "long way round"

Answer 5

after step 2, I would have divided both sides by log3
so that you get
x+1 = (log15)/(log3)
and then subtract 1 from both sides to get
x= (log15)/(log3) - 1

Answer 6

Oh... I see

Answer 7

Thx 4 the help :)